With IPHost Network Monitor you can run simple snmp requests against a Fortinet device in your network.
fnSysNetworkIfOutFrag
fn Sys Network If Out Frag
1.3.6.1.4.1.12356.1.3.1.1.7
Turn on/off fragment outgoing packets greater than MTU
Back to FORTINET-MIB MIB page.
IPHost Network monitor allows you to monitor fnSysNetworkIfOutFrag on Fortinet device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Fortinet firewalls right now.